What kind of sundial was sent to Mars? Compare how it works on Earth with how it works on Mars.

Answer:

thanks that was the same question I was asking

The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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If the torque is held constant but a much smaller rotating platform is used, the moment of inertia of the system would decrease.

This is because moment of inertia is directly proportional to the mass and the distance from the axis of rotation. Since the mass of the platform would be smaller and its distance from the axis of rotation would be smaller, the moment of inertia would decrease.  According to Newton's second law, the angular acceleration is directly proportional to the net torque and inversely proportional to the moment of inertia. Therefore, if the moment of inertia decreases, the angular acceleration would increase. This means that the angular acceleration would be higher if a much smaller rotating platform is used while holding the torque constant.  In summary, using a much smaller rotating platform while holding the torque constant would result in a lower moment of inertia and a higher angular acceleration.

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Answer:

The name of the force is elastic (spring) force

Explanation:

The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer

The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.

(a) The resistance needed to generate that current is 480 ohms.

(b) When the current increases, the resistance in the circuit decreases.

The given parameters;

The resistance needed to generate that current is calculated as follows;

\(V = IR\\\\R = \frac{V}{I} \\\\R = \frac{120}{0.25} \\\\R = 480 \ ohms\)

When the current increases, the resistance in the circuit decreases.

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In addition to ozone, the four other greenhouse gases or groups of greenhouse gases are included in nearly all the climate models are Carbon dioxide, water vapor, and methane, nitrous oxide.

Carbon dioxide, absorbs energy at a variety of wavelengths, a range that overlaps with that of infrared energy. As CO2 soaks up this infrared energy, it vibrates and re-emits the infrared energy back in all directions. About half of that energy goes out into space, and about half of it returns to Earth as heat, contributing to the ‘greenhouse effect.’

As methane is emitted into the air, it reacts in several ways. It reacts and  after oxidization methane forms water vapor and carbon dioxide. So, not only does methane contribute to global warming directly but also, indirectly through the release of carbon dioxide.

Nitrous oxide enhances the greenhouse effect by capturing reradiated infrared radiation from the Earth’s surface and subsequently warming the troposphere . It is chemically inert in the troposphere and stays in the troposphere for about 120 years before moving into the stratosphere where it ultimately leads to destruction of stratospheric ozone.

Water vapor does absorb longwave radiation and radiates it back to the surface, thus contributing to warming.

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Answer: Force

In physical science, a force is something that acts on an object by pushing or pulling it. If the force is strong enough, it changes the position or shape of the object. Forces such as friction, air resistance and simple physical contact touch the object directly, while forces like gravity, magnetism and electrostatics act on the object from a distance. Force is a vector quantity, meaning you can measure both its strength and its direction. The formula to find the measure of a force is force = mass times acceleration, written as f = ma.

Velocity

The faster something is moving, the higher its velocity.

When an object is moving, one way to measure how fast it is moving is by finding its velocity, which is the rate at which it is changing position. Like force, velocity is a vector quantity, so it includes direction. To find the average velocity of an object, divide the change in its position by the time the movement took, and state its direction. For example, if a car is driving north and in one hour's time it travels 30 miles, its velocity is 30 miles per hour, north.

\_:Peepato1234:_/

The puppy was not moving relative to Daylon, the wagon, or his collar.

He was moving relative to a point on the sidewalk.

Note that the puppy did NOT get his walk.

Answer:

Explanation:

goes down as the temperature decreases, and vice versa. Sound's frequency is independent of temperature, while its speed is directly proportional to temperature. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. ... This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.

hope this helps!!!!

Sound waves travel more fastly in hot air , since particles in atmosphere gets more energetic in higher temperature. Hence, as the temperature decreases, the wave’s speed decreases.

Sound waves are mechanical waves passing through a medium. Sound waves are longitudinal where, the oscillation of particles is along the direction of wave propagation.

Compression waves, which at a microscopic scale rely on molecules transmitting energy one to another, are used to convey sound through the air.

Higher temperatures produce more energetic air molecules, which vibrate more rapidly. As a result of the molecules colliding with one another, the sound waves can move more quickly.

Therefore, as the temperature decreases, the speed of sound wave decreases. Thus, option B is correct.

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The reasoning which is in use when large, angular rocks are interpreted to have originated from the outcrop at the top of the hill is; Fossil succession

The principle of fossil succession in characterized by the fact that fossil entities succeed one another upward through rock layers in a definite and determinable order.

On this note, any time period can be dated by its fossil content.

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The average atomic mass of element X is approximately 128.44 amu.  The average atomic mass takes into account the relative abundances of the isotopes.

The average atomic mass is calculated by multiplying the mass of each isotope by its abundance and summing up these values. In this case, element X has three isotopes:

¹²⁶X, ¹²⁸X, and ¹³⁰X, with abundances of 22.00%, 34.00%, and 44.00% respectively.

To calculate the average atomic mass, we multiply the mass of each isotope by its abundance and sum up these values. The atomic mass of ¹²⁶X is 126 amu, ¹²⁸X is 128 amu, and ¹³⁰X is 130 amu.

Using the given abundances and atomic masses, we can calculate the average atomic mass as follows:

Average Atomic Mass = (126 amu × 0.22) + (128 amu × 0.34) + (130 amu × 0.44)

                  = 27.72 amu + 43.52 amu + 57.20 amu

                  = 128.44 amu

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Answer:

Sound can't travel in a vaccum.

Explanation:

Sound waves need a medium in order to travel (e.g. air, water, glass)

Since there was a vaccum between the glass the sound couldn't travel since vaccum's contain a very small amount of atoms.

The RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

To provide a detailed explanation, when the RMS value of the electric field in an electromagnetic wave is doubled, the RMS value of the magnetic field also changes. The relationship between the electric and magnetic fields in an electromagnetic wave is governed by Maxwell's equations. These equations state that the electric and magnetic fields are perpendicular to each other and vary in intensity in a synchronized way.

In an electromagnetic wave, the intensity of the electric field and the magnetic field are related by a constant known as the impedance of free space. This constant determines the strength of the magnetic field for a given strength of the electric field. Therefore, if the RMS value of the electric field is doubled, the RMS value of the magnetic field will also double. This means that the strength of both fields increases proportionally.

To solve this mathematically, we first need to understand the relationship between the electric field (E) and the magnetic field (B) in an electromagnetic wave. This relationship is given by the formula:

E = c * B

where E is the RMS value of the electric field, B is the RMS value of the magnetic field, and c is the speed of light in a vacuum.

Now, if the RMS value of the electric field (E) is doubled, we have:
2E = c * B'

where B' is the new RMS value of the magnetic field. We can now express B' in terms of the original magnetic field B:
2E = c * B'
2(c * B) = c * B'
2B = B'

Hence, the RMS value of the magnetic field (B) will also be doubled when the RMS value of the electric field (E) is doubled. The factor by which the magnetic field changes is 2.

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The total number of significant digits in the given number is five. If the books are measured in packets of 10, the number of significant digits reduces to two.

The given data is: Total number of books in the library = 57,000. We are to determine how many significant digits are there in the result? For this, let us define what are significant digits: Digits that are used to communicate meaning or accuracy of measurements are known as significant digits. In other words, the digits that carry meaning contributing to its measurement uncertainty are called significant digits. It is used to determine the accuracy of the results. In this question, the total number of books in the library is given as 57,000. As there are five non-zero digits in the given number, there are five significant digits in the result. Will the result change if the books are measured in the packet of 10? If the number of books is measured in the packet of 10, then there will be a change in the number of significant digits. When we express 57,000 in the packet of 10, we get: 57,000 = 5.7 × 10^4. Now, there are only two significant digits in the result (5 and 7), and hence the result changes.

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If you take the wavelength of light and multiply it by the frequency of the light, you get the speed of light.

The speed of light is defined as the product of wavelength and frequency. The wavelength is the length between two successive ridges or channels of a wave, frequency is the number of wave rotations per second, and the speed of light is a steady value equal to 3.00 x 10^8 meters per second.

This connection is called as the wave-particle duality of sunlight and is expressed by the equation E=hf, where E is the vibrancy of a photon of light, h is Planck's constant, and f is the frequency of the light which is measured in meters per second.

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Alban Geissler, who developed the SKYRAY carbon fiber wing with Christoph Aarns, suggested after Baumgartner's jump that the wing he used was a copy of two prototype SKYRAY wings sold to Red Bull (Baumgartner's sponsor) two years earlier. - wiki

Answer: Hot

Explanation: Scientist use the color of starts to determine how hot the surface temperature is.

A pulsar is a neutron star that sweeps a beam of radiation past the Earth each time it rotates. So, option D is correct.

A pulsar is a highly magnetized, rotating neutron star that emits beams of electromagnetic radiation. It is formed from the remnants of a massive star that has undergone a supernova explosion.

As the neutron star spins rapidly, its intense magnetic field causes beams of radiation to be emitted from its magnetic poles. These beams are observed as regular pulses of radiation as the pulsar rotates.

Pulsars are characterized by their precise and regular periods of pulsation, which can range from milliseconds to several seconds.

The emission of radiation occurs along the magnetic axis of the neutron star, and if this axis is not aligned with the rotation axis, the beams of radiation sweep across space like a lighthouse, leading to periodic pulses of radiation detected on Earth.

The discovery of pulsars in 1967 by Jocelyn Bell Burnell and Antony Hewish provided evidence for the existence of neutron stars and opened up new avenues for studying stellar remnants and extreme astrophysical phenomena.

Pulsars are important objects in astrophysics and continue to be studied for their contributions to our understanding of stellar evolution, gravity, and the behavior of matter under extreme conditions.

So, option D is correct.

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Answer:

30 meters/day.

Explanation:

Glacial motion can be fast up to 30 meters/day or slow up to 0.5 m/year on small glaciers moving the impact on local landforms. If the glacial motion goes up to 30 meters/day, more fast change occurs in the local landforms while on the other hand, if the glacial motion goes up to 0.5 m/year, very slow change occurs in the local landforms. So glacial motion has a direct affect on the changes occurs in the local landforms.

Answer: 1.5 × 10^-17

Explanation:

Given the following :

Frequency(f) = 2.2 × 10^16 Hz

Planck's constant(h) = 6.63 × 10^-34

The energy of a photon 'E' is given as the product of frequency and the planck's constant

E = hf

E = (6.63 × 10^-34) × (2.2 × 10^16)

E = 6.63 × 2.2 × 10^(-34 +16)

E = 14.586 × 10^-18

E = 1.4586 × 10^-17

E = 1.5 × 10-17 (2 S. F)

Answer:

C. 1.5 × 10–16 J

Explanation:

Answer:

\(\boxed {\boxed {\sf 5.6 \ m/s^2}}\)

Explanation:

We are asked to find the acceleration of a sports car.

Acceleration is the rate of change of velocity with respect to time. It is the change in velocity over time. Therefore, the formula for calculating acceleration is:

\(a= \frac {v_f-v_i}{t}\)

The car can accelerate from 5.0 meters per second to 30 meters per second in 4.5 seconds.

Susbtitute the values into the formula.

\(a= \frac{ 30 \ m/s - 5.0 \ m/s}{4.5 \ s}\)

Solve the numerator.

\(a= \frac{25 \ m/s}{4.5 \ s}\)

Divide.

\(a=5.55555556\)

The original measurements all have 2 significant figures, so our answer must have the same. For this number, 2 sig fig is the tenth place. The 5 in the hundredth place tells us to round the 5 in the tenth place up to a 6.

\(a \approx 5.6 \ m/s^2\)

The sports car's acceleration is approximately 5.6 meters per second squared.

Answer: Negative Incentives

Decrease

More

Explanation:

Took it on EDG 2021

Price can be defined as the amount of money that must be paid by a buyer (customer) to a seller (producer or owner), so as to acquire goods and services.

This ultimately implies that, it is an amount of money a customer that is buying goods and services are willing to pay to the seller (producer or owner) for the goods and services being offered.

In this scenario, we can deduce the following points:

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The resistance in the 27-volt circuit necessary to obtain a current of 0.66 amps is roughly 40.91 ohms.

Ohm's Law, which states that voltage (V) equals the product of current (I) and resistance (R), can be used to determine the resistance necessary in a circuit to achieve a certain current. The formula is as follows:

V = I * R

Voltage (V) = 27 volts is given.

I (current) = 0.66 amps

We must locate the resistance (R). Rearranging the formula yields:

R = V / I

Substituting the following values:

R is equal to 27 volts / 0.66 amps.

Calculating:

R ≈ 40.91 ohms

As a result, the resistance in the 27-volt circuit necessary to obtain a current of 0.66 amps is roughly 40.91 ohms.

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Explanation:

An organ is made of several types of tissue and therefore several types of cells. For example, the heart contains muscle tissue that contracts to pump blood, fibrous tissue that makes up the heart valves, and special cells that maintain the rate and rhythm of heartbeats.

Answer:

One possible reason is that change in velocity is greater for the individual with lower mass.

Explanation:

By Newton's Law of Mechanics, magnitude of the force on two players would be the same in the collision. Let \(F\) denote this magnitude.

Assume that the duration of the collision is \(\Delta t\). In this collision, magnitude of the impulse \(J\) on each player would be the same: \(J = F\, \Delta t\).

At the same time, impulse is equal to the change in momentum. Specifically, if the mass of one player is \(m\) and the change in their velocity is \(\Delta v\), the change in their momentum would be \(m\, \Delta v\). Thus:

\(m\, \Delta v = J = F\, \Delta t\).

Rearrange to obtain an expression for the change in velocity:

\(\begin{aligned}\Delta v &= \frac{J}{m} = \frac{F\, \Delta t}{m}\end{aligned}\).

In other words, in this collision, change in velocity is inversely proportional to the mass of the participant. Hence, even though the two players experienced force of the same magnitude, the participant with a lower mass would experience a greater change in velocity.

Central venous pressure is blood pressure in the venae cavae, close to the right atrium of the heart.

The blood pressure in the venae cavae, close to the right atrium of the heart, is known as central venous pressure (CVP). The CVP measures both the volume of blood returning to the heart and the heart's capacity to pump blood back into the arteries.

Since there might occasionally be a pressure difference between the venae cavae and the right atrium, CVP is frequently a good approximation of right atrial pressure (RAP), despite the fact that the two terms are not interchangeable. When artery tone is altered, CVP and RAP can be different.

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According to past research, women have engaged in token resistance, which means they said no but then changed their minds and said yes. This occurs because of the cultural expectations that women are supposed to resist sexual advances even if they want to participate.

Because of this, women may feel pressure to refuse initially to maintain their reputation and avoid being seen as promiscuous. However, once the partner persists, they may give in to avoid being seen as too difficult or cold-hearted. Research has indicated that these behaviours are particularly evident in situations where the individual feels vulnerable or feels that they are in a low-power position. Women may also engage in token resistance to test their partner's sincerity and willingness to respect their boundaries. Additionally, it's worth noting that token resistance does not apply only to women, as men may also engage in this behaviour.

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To find

Acceleration is a change in what quantity Over time?

Explanation

Acceleration is defined as the change in velocity with respect to time interval.

Conclusion

The required quantity is

A. speed